Method and control unit for operating a valve

A method for operating an injection valve of an internal combustion engine of a motor vehicle activated with the aid of an actuator, where the actuator is activated using an activation signal characterizing a desired opening duration of the valve, the method comprising:

• correcting the activation signal characterizing the desired opening duration as a function of a valve delay time to obtain a corrected activation signal for activating the actuator, the valve delay time representing a temporal deviation between the activation signal and an actual change of an operating state of at least one component of the valve;
• ascertaining an uncorrected activation duration as a function of operating variables of the internal combustion engine;
• correcting the uncorrected activation duration with the aid of a closing delay time correction value, which is ascertained as a function of an actual closing delay time;
• ascertaining a setpoint closing delay time as a function of operating variables of the internal combustion engine;
• ascertaining a closing delay time adaptation value as a function of a deviation between an actual closing delay time and the setpoint closing delay time;
• ascertaining the closing delay time correction value as a function of operating variables of the internal combustion engine, and as a function of the closing delay time adaptation value;
• and
• activating the actuator using the corrected activation signal.

A control unit for operating an injection valve of an internal combustion engine of a motor vehicle activated with the aid of an actuator, where the actuator is activated using an activation signal characterizing a desired opening duration of the valve, the control unit configured to correct the activation signal characterizing the desired opening duration as a function of a valve delay time to obtain a corrected activation signal for activating the actuator, the valve delay time representing a temporal deviation between the activation signal and an actual change of an operating state of at least one component of the valve, to ascertain an uncorrected activation duration as a function of operating variables of the internal combustion engine, to correct the uncorrected activation duration with the aid of a closing delay time correction value, which is ascertained as a function of an actual closing delay time, to ascertain a setpoint closing delay time as a function of operating variables of the internal combustion engine, to ascertain a closing delay time adaptation value as a function of a deviation between an actual closing delay time and the setpoint closing delay time, to ascertain the closing delay time correction value as a function of operating variables of the internal combustion engine, and as a function of the closing delay time adaptation value, and to activate the actuator using the corrected activation signal.

A memory device storing a computer program including program-code for operating an injection valve of an internal combustion engine of a motor vehicle activated with the aid of an actuator, where the activator is activated using an activation signal characterizing a desired opening duration of the valve, the program code, when executed by a processing unit, causing the processing unit to perform the steps of:

• correcting the activation signal characterizing the desired opening duration as a function of a valve delay time to obtain a corrected activation signal for activating the actuator, the valve delay time representing a temporal deviation between the activation signal and an actual change of an operating state of at least one component of the valve;
• ascertaining an uncorrected activation duration as a function of operating variables of the internal combustion engine;
• correcting the uncorrected activation duration with the aid of a closing delay time correction value, which is ascertained as a function of an actual closing delay time;
• ascertaining a setpoint closing delay time as a function of operating variables of the internal combustion engine;
• ascertaining a closing delay time adaptation value as a function of a deviation between an actual closing delay time and the setpoint closing delay time;
• ascertaining the closing delay time correction value as a function of operating variables of the internal combustion engine, and as a function of the closing delay time adaptation value;
• and
• activating the actuator using the corrected activation signal.

A computer-program product having program-code which are stored on a computer-readable data carrier, the program-code for operating an injection valve of an internal combustion engine of a motor vehicle activated with the aid of an actuator, where the activator is activated using an activation signal characterizing a desired opening duration of the valve, the program code, when executed by a processing unit, causing the processing unit to perform the steps of:

• correcting the activation signal characterizing the desired opening duration as a function of a valve delay time to obtain a corrected activation signal for activating the actuator, the valve delay time representing a temporal deviation between the activation signal and an actual change of an operating state of at least one component of the valve;
• ascertaining an uncorrected activation duration as a function of operating variables of the internal combustion engine;
• correcting the uncorrected activation duration with the aid of a closing delay time correction value, which is ascertained as a function of an actual closing delay time;
• ascertaining a setpoint closing delay time as a function of operating variables of the internal combustion engine;
• ascertaining a closing delay time adaptation value as a function of a deviation between an actual closing delay time and the setpoint closing delay time;
• ascertaining the closing delay time correction value as a function of operating variables of the internal combustion engine, and as a function of the closing delay time adaptation value;
• and
• activating the actuator using the corrected activation signal.